Nut-lock.



unrrnn STATES Prrnnr onirica TODD C. WOODWORTH, OF WILLIAMS, ARIZONATERRITORY, ASSIGNOR TO FRANK B. KEEVER.-

Application filed June 18,

Specification of`Letters Patent.

Patented Dec. 1, 1908.

1908. Serial No. 439,217.

and useful Improvements in Nut-Locks; and

I do hereby declare the following to he a lull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to .make and use the same.

lily invention relates to new and useful imrovements in nut locks andmore particuarly to that class employing a locking de- I vice inconnection with the). threads on the bolt to lock the nut in itsadjusted position, and my object is to provide a locking device ladapted to be entered through arecess in the nut and engage the threadsron the bolt.

A further object is to provide means on the locking device adapted toengage the faces and edge of the threads on the bolt and bind on theperiphery of the bolt, whereby the nut will be securely locked in itsadjusted position.

A further object is to so arrange the engage ing rnecl'ianism on thelocking device whereby when the locking device is properly in-l serted,the locking action thereon will be increased when Arotating pressure isapplied to the nut torcmovc the same and a still further object is to soconstruct the locking de vice that a seat or shoulder' will be providedthereby, when so desired.

I@ther objects and advantages will be hereinafter referred to and moreparticularly pointed. out in the claims.

ln the accompanying drawings which are made a part of thisspecification, Figure l is a perspective x .ow oll a bolt showing a nutthereon in locked position. Fig. 2 is aside elevation thereof, showingthe nut in section. Fig. I-l is a transverse sectional view through thebolt and nut, showing the locking pin in lull lines. Fig. is a sectionalview through.

the nut as seen on line 44, Fig. 3. is a similar view, with the lockingin removed.. Fig. 6 is a plan view of the ocking pin removed from thenut, and, Fig. 7 is an elevation ol a slightly modified forni of lockingpin. i

Referring to the drawings in which similar reference numerals designatecorresponding parts througl'iout the several views, l indieates a holtsuch as is commonly used in Fig. 5

j railway track construction, said bolt having i a head 2 at one end andthe usual or any prel ferred forni of thread 3 at the opposite end, saidthread being extended a suitable disg tance along the bolt as may bedesired.

Adapted to engage the threaded end of the bolt 1, is the usual or anypreferred form of nut 4, although said nut is preferably made lhexagonal, the opening in said nut being pro-- l vided with threads 5adapted to engage the Vl threads 3 and cause the nut to 'travel on the lbolt 1 and in order to securely lock the nut on the bolt at anypreferred point, a bore 6 is extended laterally through the nut 4; fromface to face thereof, said bore being so posii, tioned as to intersectthe threads 5 in the nut and remove a portion thereof, forming a recess7'at a point substantially at the longij tudinal center of the bore 6,whereby the threads on the bolt when being passed through the nut willenter said recess and protrude into thebore 6.

The nut 4 is locked in its adjusted position by introducing a pin 8through the bore 6, one portion of the periphery of the pin beingadapted to engage the portions of the threads extending through therecess 7 and to form a positive locking action between the pin 8 and thethreads 3, said pin provided on its engaging face with longitudinallyextending ribs 9, which ribs extend from end to end of the pin 8 and arepreferably formed in pairs, although if preferred, a single rib may beemployed if deemed expedient. n

The ribs 9 are substantially Wedge shape in cross section and are sospaced that when the pin is entered through the bore 6 under pressure,bothfaces of the thread 3 inter' secting the center of the recess 7 willbe firmly engaged by the inner faces of the ribs 9, while the op osedfaces of the threads adjacent each eiulbf the recess 7 will be gripped lby the outer faces of said ribs and as the outer faces of the lastmentioned threads are engaged by the threads 5 adjacent each end of therecess 7, said. threads 3 will be pren vented from yielding or spreadinglaterally thus providing a firm gripping surface for the ,pin andpositively locking the nut in its ad justed position. i

The bore 6 is preferably at right angles to the axial trend of the boltl, while the threads 3 are more or less s )irally arranged l ou thebolt, whereby when the pin el is introduced through the bore 6, the ribsQ willhc Ille ' any reverse moverL ent of thel nut.

slightly out of alineinentvvitl the trend of the threads 3, 'as bestshown in fiig. 4, this slight variation of the pai h oi' the nbs withrespect' to the threads, causan.; the laf-es of' the ribs to more firmlyengag` thiy faces of the threads and give a lateral clamping Feet at thepoint of engagement between the threads and ribs.

,To prevent the pin from be( otiing loosf' ened by turning or attei i)ting to turn the i nut reversely to remove the same from the K bolt,the ribs 9 are oreferabhY slightly in` clined from one enc' of the pin,as best shown in Fig. 3 and by always introducing the pin from one endof the bore, the reverse pressure on the nut, in ,'icw of the. taper ofthe ribs, will cause tht p'n to more firmly engage the threads on thebolt aud thereby prevent Instead, however, of forming the ribs 9 on aninclined plane, the curved surface of the pin 8 may be inclined as shownin Fig, 7, and thereby accom lish the sane result as n hen the ribs areinc ined.

lf preferred, the ribs D may be constructed l' of a slightly greaterdepth than the' height of i the threads 3, or the bore o placed slightlyi nearer the axial center of the nut whereby when the pin' has beenintroduced'through the bore 6, the apices of the ribs will-displace aportion of the surface of the bolt at' the base' of the threads 3, whilethe apex of that thread between the ribs will be likewise slightlydepressed or flattened, thereby forming a base or shoulder for the ribs,the holding action of the pin in this instance being i' similar to theaction of a key on a flat surface or seat.

In applying the bolt to use, it is properly I introduced through anobject and the nut 4 turned thereon until 'the object is firmly clampedbetween the head 2 and nut 4, when the pin 8 is introduced through thebore 6 and the ri-bs thereon forced into engagement with the threads onthe bolt this result beingr accomplished in any suitable manner as bydelivering a blow, or la number of blows, on the end of the pin and inview ofl the fact I, that it takes but a minor blow to release the ipin, the same may be. positively secured in the bore by slightlydepressing the entering end of the pin, after it has passed through andbeyond the face of the nut.

When the ribs 9 are so constructed as to displace a portion of thesurface ofthe bolt and thread, to forni a flat seat for said ribs, j itwill be clearly understood that said disi placement is so slight as notto mutilate the th'read to such an extent as to prevent the nut 4 fromreadily turning on said threads and in this `tance the key is preferablyconstructed of a slightly harder grade of metal j' than the boit l sothat the ribs or pin will not f be forced out of shape when entered intoengagement with the nut. It will likewise be l l the threads in the nut,a

'ther be seen that as the pin is introduced afte'r the nut has beenturned home said pin will not interfere with the free use of a wrenchfor turning the nut and that the same pm may be used indefinitely forsecuring the nut in its locked position.

What I claim is:

l.` The combination with a bolt having threads thereon and a nutcooperating with said bolt having a bore therethrough 5 of a lockingninhaving ribs thereon of a greater depth than the height of the threads onthe bolt adapted to engage the threads on the bolt and lock the nut, thetrend of said ribs being slightly at variance from the trend of thethreads on the bolt.

2. In a nut lock, the combination with a bolt having threads at one end,and an intej riorly threaded nut cooperating with said bolt, said nuthaving a bore therethrough displacing a portion of the threads nin thenut; of a pin adapted to enter said bore, ribs extending longitudinally,of the pin, said ribs being tapered from end to end of the pin andextending at an angle to the trend of the threads on the bolt.

3,- In a nut lock, the combination with a bolt having threads thereon;of an interiorly threaded nut adapted to cooperate with the bolt, saidnut having a bore extending laterally therethrough cated to intersectand displace a portion of pin adapted to enter said bore, ribs on saidpin of greater depth than the height of the threads on the bolt, wherebywhen said in is driven into the bore, the surface of the olt between thethreads thereon and the u i er edge of the thread bctween the ribs willbe flattened to form seatsv for the ribs.

4. In a nut lock, the combination with a bolt having threads thereon,and an interiorly threaded nut adapted to engage the threads on the boltsaid nut having a bore extending laterally therethrough and removing aportion of the threads in the nut to form a recess, of a pin adapted tobe entered through said bore and means on said pin adaptedto form aflattened seat between the threads on the bolt and at the apex of thethreads on thev bolt.

bolt having threads thereon, ol an interiorly threaded nut having a boreextending laterally therethrough and a recess 'connecting said bore withthe interior ol' the nut, adapted to pass through said bore and means onthe pin adapted to engage. both l'aees of one thread on the bolt andone, lace ol' the, threads at opposite sides of the. lirst nicn- 5. ln anut lock, the combination with a a pin' from face to face and lothroughin position to intersect the opening in the nut adjacent the peripheryof the opening, a pin adapted to extend through said ltirnied,engagedthread said means orming seats between the threads on the bolt and onthe a eX ofthe first mentioned thread,

6. 1in a nut lock, the combination with a 5 bolthaving threads thereonoi" an interiorly the threads entering' said recess and form threadednut having a bore, extending seats on the a exof and between said boitthrough the nut in position to intersect the threads said ris engagingsaid threads at an openin in the nut and formacommunicating inclination:A l recess etween the bore and o ening and In testimony whereof I havesigned my 10 means adapted to be entered t rough said name to thisspecification in the presence oi bore and engage the threads on the boltand i two subscribing Witnesses. `form seats between the boit threadsand on TODD C' WOODWORTH the aex thereof. Y

7; n a nut lock, the combination with a i Witnesses: 15 bolt havingthreads thereon, of an interiorly C. A. NEALE, `threaded nut 'having abore extending there- E. F. GILL.

bore and ribs on said pin adapted to engage

